Mechanical movement.



J. L. TOMER.

MECHANICAL MOVEMENT.

APPLICATION FILED AUG.14, 1909.

Patented Mar. 15, 1910.

UNITED STATES PATENT orrioa JOHN L. roman, 0F Exro'nr, PENNSYLVANIA,ASSIGNOIt or oNE-HALF roonoaen n. neuron, OF NEW KENSINGTON,PENNSYLVANIA.

MECHANICAL MOVEMENT.

Specification of Letters Patent.

Patented Mar. 15, 1910.

Application filed August 14, 1909. Serial No. 512,819.

tain new and useful Improvements in Mechanical Movements, of which thefollowing is a specification, reference being had therein to theaccompanying drawing.

My invention refers to an improvement in mechanical movements and hasfor its objects to provide means for converting rotary motion intoreciprocating motion or vice versa, the invention being particularlyapplicable to the operation of pumping wells, the cutter bar of reapers,etc., or wherever it is desired to utilize the movement.

The invention is illustrated in the accompanying drawings in whichFigure 1 is a view in front elevation of the invention. Fig. 2 is ahorizontal sectional view on the line a, a, of Fig. 1. Figs. 8, 4, 5 and6 are diagrammatic Views illustrating several progressive positions ofthe parts.

The invention is designed to overcome the objections due to the deadcenter or centers of crank movements and to utilize the full efficiencyof a rotating shaft at all times. The movement is accomplished by meansof a stationary toothed wheel engaging a rotatably carried toothed Wheelmounted in a swinging disk or carrier head which also carries thedriving wheel intermeshing with said traveling wheel, the driving wheelbeing mounted by a journal which in turn is provided with a crankprovided with a wrist pin and a connection rod or pitman, whereby thewrist pin will constantly travel back wardly and forwardly in a straightline when motion is imparted to it by means of the carrier head and itsgears intermeshing with the stationary gear and controlled thereby.

In the drawings, 2 represents the shaft which when used as a drivingshaft maybe actuated by any suitable means or prime mover for rotation,as a pulley 3 and belt 4. Said shaft 2 is mounted in a stationarybearing. 5 of any suitable construction, to the face of which is securedthe stationary gear wheel 6 by means of bolts 7 or in any suitablemanner. To the end of shaft 2 is secured the disk or carrier head 8 by akey or otherwise, whereby said head is rotated around with shaft 2 bythe belt and pulley.

9 is an idler wheel pivotally mounted at 10 on said carrier head 8 andin intermeshing engagement with wheel 6, while at any other suitablepoint on. carrier head 8 is journaled the shaft 11 provided on the sameside of the carrier head with a corresponding driven wheel 12 and at theother side of the carrier head 8 with the crank 13 having the wrist pin14 to which is secured the pitman 15, to which reciprocating motion isto be imparted along the line a, a. In order to accomplish the desiredtravel of wrist pin 14, wheels 9 and 12 are of the same diameter and ofone-half the diameter of stationary wheel 6.

As shown in the position, Fig. 1, the wrist pin 14 is located in thesaid line of travel a, a, passing through the center of shaft 11 andshaft 2 when at the position of extreme throw at one side or the otherconstituting the limit positions of the stroke. That is to say, assumingthe journal 11 and crank pin 14 to be in any position as the initialposition, then the shafts 2 and 11 and wrist pin 14: will be in line asshown, and wrist pin 11 will conform to said line a, a, at any positionthroughout its entire travel forwardly or backwardly.

In the position of the apparatus as indicated in Figs. 1 and 2 the lineis indicated as shown on the horizontal, but it is obvious that suchline of travel may be arbitrarily selected, either for horizontal motionor vertical motion or at any intervening angle. The parts having beenonce fixed by proper meshing of the teeth of wheel 6 with the teeth ofidler wheel 9 and of said wheel with wheel 12 with relation to theproper position of wrist pin 14, the device is ready for operation.

The operation is as follows: Upon rotation being imparted to shaft 2 andits carrier head 8 in journal bearing 5, for instance in the directionof the arrow 6 Fig. 1, wheel 9 will be carried around stationary wheel(3 as will also wheel 12, both of said wheels rotating at an equal speedin the direction of their indicating arrows, wheel 12 of shaft 11actuating crank 13. It will be observed that in the construction shown,the length of crank 13 is co-extensive with the distance between shaft 2and shaft 11, so that when the carrier head has been thrown around forone quarter revolution, wrist pin 14 will correspond in its positionwith the center of shaft 2 as shown in Fig. 3. F i 4- shows the positionof the crank 13 an its wrist pin after an additional one-ei hth throw ofthe carrier head 8, Fig. 5 s liowing the position at the completion ofan entire onehalf revolution of the carrier head, and Fig. 6 showing theposition of the crank and wrist pin on their backward travel when thecarrier head has completed three-quarters of the revolution. Throughoutthe entire travel of the carrier head forwardly and backwardly the wristpin will accurately follow the straight line of travel a, it, impartingcorresponding travel to the connecting rod or pitinan 15. The stroke ofthe wrist pin is controlled by the length of the crank 13 and by thedistance, corresponding to its length, between shafts 2 and 11. Thisdistance may be accurately regulated in designing the apparatus for thedesired work, locating the gear 12 toward or from the center ofstationary gear 6 with the idler wheel 9 at a suitable correspondingposition to insure proper meshing of the teeth, or if the change instroke desired is beyond the range of adjustment inwardly or outwardlyof wheel 12, then the proportions of the several wheels may be changedto suit the conditions and requirements.

It is obvious that the shaft 2 may be continuously rotated for completereciprocations of the wrist pin 14 and its connecting pitman for thefull throw, or that any less throw with the same mechanism may also beaccomplished by alternate back and forward partial rotations of shaft 2,less than a one-half revolution thereof, for which purpose a crankhandle may be substituted for the pulley 3.

The invention may be variously utilized or adapted to a great variety offunctions or uses; it overcomes the objections of the usualreciprocating connecting rods, develgping the highest percentage ofpower uni ormly throughout its operation, with a slight allowance forfriction due to the int-erengaging gears. It may be variously changed ormodified in construction, care being taken to adhere to the relativeproportions of the parts as herein set forth, and may be modified orvaried by the skilled mechanic to suit different conditions ofapplication, but all such changes are to be con sidered as within thescope of the following claims:

What I claim is 1. Means for converting rotary motion into reciprocatingmotion consisting of a power driven actuating shaft, a bearing therefor,a series of stationary teeth annularly arranged around the center ofsaid shaft, a carrier head secured to the shaft and provided with arotatable journal, a crank having a wrist pin secured to said journal, arotatable toothed wheel on said journal, and toothed gearing connectingsaid wheel with said stationary annular teeth, substantially as setforth.

2. Means for converting rotary motion into reciprocating motionconsisting of a power driven actuating shaft, a bearing therefor, aseries of stationary teeth annularly arranged around the center of saidshaft, a carrier head secured to the shaft and provided with a rotatablejournal, a crank having a wrist pin secured to said journal, a rotatabletoothed wheel on said journal, and an' idler wheel mounted in thecarrier head and meshing with said wheel and with the annular stationaryteeth, substantially as set forth.

3. Means for converting rotary motion into reciprocating motionconsisting of a power driven actuating shaft, a bearing therefor, aseries of stationary teeth annularly arranged around the center of saidshaft, a carrier head secured to the shaft and provided with a rotatablejournal, a crank having a wristpin secured to said journal, a rotatabletoothed wheel on said journal, toothed gearing connecting said wheelwith said stationary annular teeth, and means for actuating the firstnamed shaft in its hearing, substantially as set forth.

In testimony whereof I aiiix my signature in presence of two witnesses.

JOHN L. TOMER.

Witnesses:

C. M. CLARKE, CHAs. S. LEPLEY.

